The pair took videos of themselves shooting the dog execution-style with an assault rifle, authorities said. They can be heard chuckling as the dog twitches, according to the Cumberland County Sheriff’s Office.

The footage circulated on Facebook, authorities said. After Rollins shot her emotional support dog five times, Heng fired another five rounds into the dog's corpse.

“They can be heard on the tape laughing and giggling as the dog was being killed,” Cumberland County District Attorney Clark Reaves said during a Tuesday court appearance, The Fayetteville Observer reported.

The dog, named Cam, had been adopted last year by Rollins’ husband, also a soldier. When he deployed to South Korea, he left the dog with his estranged wife.

Rollins, who has been diagnosed with PTSD, later had the pit bull mix certified as a therapy dog, the paper reported.

Heng is stationed at Fort Bragg. Rollins retired earlier this year for medical reasons, officials said.